Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
va thanh » gia thanh, ban thanh, va tinh
nang dai » nang dau, nang tai, lang dai
hieu van » hieu va, thien van, lieu va
su sach » vu sach
cam duc » cam xuc, cao duc, pham duc
dai hoi » dai hoc, dai hai, dai moi
so sach » so sanh, bo sach, co sach
van cam » van nam, van lam, van cau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (so sach)) ky nang dai hoi. hieu van cam duc va thanh vai ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky nang dai hoi. hieu van cam duc va thanh vai ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) ky nang dai hoi. hieu van cam duc va thanh vai ((cua triet) OR (su triet))".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ky nang dai hoi. hieu van cam duc va thanh vai ((cua triet) OR (su triet))*.